Active Member
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[China]
Address: Plant 106, No. 25, Taian Road, XINQIAO VILLAGE, PANYU DIST. GUANGZHOU CHINA
Contact name:VANESSA WANG
Guangzhou Anlai Airtech Co.,Ltd |
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How Particle Size Impacts Classification?
If a cleanroom has been designed and built in a clean environment and constructed from non-particulating materials, then air flow is the determining factor of a cleanroom’s cleanliness. Cleanliness or ISO Class, is a metric measured by the number of airborne particles more than 0.5µm in diameter, per cubic metre of space.
For example, a customer that requires less than 100 particles per square metre within their clean room, may determine they require an ISO 5 cleanroom. But there is a significant difference if that particle is 0.5 micron in size, or 5 microns in size. So, if they think they’re looking at a 0.5 micron sized-particle, but really the particle that is a problem is a 5-micron particle – From a cleanroom classification standpoint, this doesn’t translate to an ISO 5 cleanroom, but an ISO 8 cleanroom.
How Contamination Relates to Cleanroom Classification?
Modular cleanrooms must be designed, built, and operate in accordance with the ISO 14644-1 classification of cleanliness.
The required standard of cleanliness of a room is dependent on the task performed in it; the more susceptible the product is to contamination the higher the standard of cleanliness required. Upon receiving a classification, the room must be maintained to meet the specifications for:
Cleanliness
Temperature
Humidity
Pressure
Number of air changes/hr
Flow rate
Cleanroom ISO Classification
ISO Class 1 is ranked as the cleanest throu
